@function m-w($num) {
  @return 100vw/750 * $num;
}
// 高度可以不自适应
@function m-h($num) {
  @return 100vh/1334 * $num;
}
.over_el {
  overflow: hidden; //超出的文本隐藏
  text-overflow: ellipsis; //溢出用省略号显示
  white-space: nowrap; //溢出不换行
}
.flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
